Merge pull request #670 from Zankaria/remove-polyfill

Remove polyfills for php 5.4 and 5.6

composer.json

@@ -31,7 +31,6 @@
             "inc/mod/auth.php",
             "inc/lock.php",
             "inc/queue.php",
-            "inc/polyfill.php",
             "inc/functions.php"
         ]
     },

inc/polyfill.php

@@ -1,28 +0,0 @@
-<?php
-
-// PHP 5.4
-
-if (!function_exists('hex2bin')) {
-	function hex2bin($data) {
-		return pack("H*" , $hex_string);
-	}
-}
-
-// PHP 5.6
-
-if (!function_exists('hash_equals')) {
-	function hash_equals($ours, $theirs) {
-		$ours = (string)$ours;
-		$theirs = (string)$theirs;
-
-		$tlen = strlen($theirs);
-		$olen = strlen($ours);
-
-		$answer = 0;
-		for ($i = 0; $i < $tlen; $i++) {
-			$answer |= ord($ours[$olen > $i ? $i : 0]) ^ ord($theirs[$i]);
-		}
-
-		return $answer === 0 && $olen === $tlen;
-	}
-}